光学法布里-珀罗干涉传感器的q点稳定

Jianyong Chen, Zhi-zong Wu, Yixuan Wu
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引用次数: 0

摘要

光学法布里-珀罗传感器开发的应变/振动检测技术在建筑物健康监测、位移检测、水下水听器和声波检测等领域得到了广泛的应用。光纤法布里-珀罗干涉仪(FFPI)作为检测声波的极好工具,因为它的高灵敏度和高频率响应,显示出尺寸简单紧凑,对环境波动不敏感的优点,适用于最小串扰的点测量。然而,对工作点的控制不佳一直是限制FFPI传感器在传感器行业实际应用的主要因素。提出了一种利用热沉温度调节光源波长和反馈控制电路的主动反馈控制结构。该解调方法配置简单,调频速度快,无调频范围限制。设计并演示了一种主动反馈控制系统,表明该方法简单、易于操作。测量结果表明,该方法有效地实现了良好的q点跟踪。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Q-Point Stabilization of Optical Fabry-Perot Interferometric Sensor
Strain/vibration detection developed by optical Fabry-Perot sensor is applied in several situations involving building health monitoring, displacement detection, underwater hydrophone and acoustic wave detection. The fiber Fabry-Perot interferometer(FFPI) serves as an excellent tool for detecting acoustic waves because its high sensitivity and high frequency response, showing advantages of being simple and compact in size, insensitive to environmental fluctuations, and suitable for point measurements with minimal cross talks.. However, poor control of the operation point has been a major factor that limits the practical application of FFPI sensors in the sensor industry. An active feedback control configuration has been proposed that uses a light source wavelength adjusting by heat-sink temperature and a feedback control circuit. This demodulation method has a simply configuration, high tuning speed, and no tuning range limit. An active feedback control system is designed and demonstrated, indicating the method is simple and easy operating. Measurements show that good tracing of Q-point was effectively realized.
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